Rear differential looks wet.

[Andy G]

Truck drives fine but obviously it isn’t good. Haven’t noticed any oil puddles on the floor or any big leaking. What you guys think it can be? Here’s a pic. 

[catpartsman]

Definitely a pinion seal going out. Mine was replaced at 70,000.


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[rav3]

You have a little leak in your differential pinion seal.

Gm Truck and SUV Pinion Seal Replacement

[Andy G]

2 minutes ago, catpartsman said:

Definitely a pinion seal going out. Mine was replaced at 70,000.


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Hopefully my extended warranty covers this. I’m currently at 78,000 miles.

[catpartsman]

It should. Mine did.


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[BlackisBeautiful]

Make sure the diff vent is clear of blockages, if not, that is indeed a pinion seal failure.